Sodium Hypochlorite is a greenish-yellow liquid commonly referred to as “Bleach.” The Sodium hypochlorite is an organic compound with the formula NaClO. The IUPAC name of this chemical is sodium hypochlorite. it is also named as Hypochlorous acid, sodium salt. The product’s categories are Industrial/Fine Chemicals; Biocide; Hypochlorites; Hypochlorites Essential Chemicals; Oxidation; Reagent Grade; Routine Reagents; Synthetic Reagents. Besides, it has strong odour, which should be stored in a cool and well-ventilated place.
1. Uses of Sodium hypochlorite
In household form, sodium hypochlorite is used for removal of stains from laundry. It is particularly effective on cotton fiber, which stains easily but bleaches well. Sodium hypochlorite has been used for the disinfection of drinking water. In batch treatment operations, sodium hypochlorite has been used to treat more concentrated cyanide wastes, such as silver cyanide plating solutions. Sodium hypochlorite is now used in endodontics during root canal treatments.
2. Physical properties about Sodium hypochlorite
CAS Registry Number:7681-52-9
Appearance:colourless liquid with strong odour
Density:1.25 g/mL at 20 °C
Boiling Point:111 °C
Melting Point:-16 °C
Stability:Stable. Contact with acids releases poisonous gas ( chlorine ). Light sensitive. Incompatible with strong acids, amines, ammonia, ammonium salts, reducing agents, metals, aziridine, methanol, formic acid, phenylacetonitrile.
Chemical Properties:colourless liquid with strong odour
General Description: Green to yellow watery liquid with an odor of bleaching liquid odor. Sinks and mixes with water.
Air & Water Reactions: Water soluble. Decomposes into chlorine and oxygen gases in hot water.
Reactivity Profile:Salts of hypochlorous acid, HClO. Generally toxic, irritants and powerful oxidizers, particularly in the presence of water at higher temperature as they decompose to release oxygen and chlorine gases. On contact with urea they form the highly explosive NCl3 . When heated or on contact with acids, they produce highly toxic fumes of chlorine gas . Can react with sulfuric acid to produce heat and chlorine gas.
Health Hazard :Liquid can be irritating to skin and eyes if contact is maintained.
Fire Hazard: Behavior in Fire: May decompose, generating irritating chlorine gas.
3. Preparation of Sodium hypochlorite
This is the only large scale industrial method of sodium hypochlorite production. In this process sodium hypochlorite (NaClO) and sodium chloride (NaCl) are formed when chlorine is passed into cold and dilute sodium hydroxide solution. It is prepared industrially by electrolysis with minimal separation between the anode and the cathode. The solution must be kept below 40 °C (by cooling coils) to prevent the undesired formation of sodium chlorate.
Cl2 + 2 NaOH → NaCl + NaClO + H2O
4. Safety of Sodium hypochlorite
When you are using this chemical, please be cautious about it as the following:
It contacts with acids liberates toxic gas and can cause burns. After contact with skin, wash immediately with plenty of . In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Besides, this chemical is irritating to eyes, respiratory system and skin. When you are using it, wear suitable gloves and eye/face protection. In case of accident or if you feel unwell seek medical advice immediately.